Vibrating arrangement for the separation of admixtures from molten metal baths



Jan. 29, 1952 NNEN 2,583,645

C. HA VIBRATING ARRANGEMENT FOR THE SEPARATION OF ADMIXTURES FROM MOLTEN METAL. BATHS Filed Sept. 5, 1950 m -B P @d m Czar; ens Havmeu I n vental":

Patented Jan. 29, 1952 VIBRATING ARRANGEMENT FOR THE SEPARATION OF ADMIXTURES FROM MOLTEN METAL BATHS Clemens Hannen, Sinzig-Rhein-Ahr, Germany Application September 5, 1950, Serial No. 183,270 In Germany October 5, 1948 3 Claims. 1

It is known that part of the undesirable admixtures in molten metal baths, such as sulphide and the like, can be separated from the said baths by means of vibrations exerted on the baths. In order to withhold these vibrations from the means for the conveyance of the receptacles containing the metal baths and especially from the receptacles themselves, the structure and lining of which might thereby be impaired, it has already been proposed to transmit the vibrations to plates lying on the surface of the bath, from which plates they pass directly into the interior of the bath. It is also known that such plates can be protected from consumption by burning and melting, by covering the bath with suitable granular, pulverous or fluid materials which may at the same time serve as binding agents for the substances separated from the baths.

It has been found in practice that the plate acting on the surface of the bath must not be rigidly connected to the impact arrangement if it is desired to obtain a thorough action and to avoid undesirable splashing of the bath. The interposition of a spring to avoid excessive rebounding effects is also insuilicient. However, favourable efiects can be obtained if, in accordance with the invention, the plate acting on the surface of the bath is elastically suspended so as to have a vertical oscillating movement about a central position.

Preferably, the impact arrangement will be mounted in the suspension of the plate acting on the surface of the bath and the impact element thereof will be arranged to strike against a central portion of the plate acting on the surface of the bath. Furthermore, it has been found advantageous to make the impact arrangement so heavy or to load it to such an extent that the recoil occurring on the impact does not substantially vary the load on the suspension arrangement and in any case does not cause the suspension arrangement to spring up.

A possible embodiment of the subject of the invention is diagrammatically illustrated in the accompanying drawing.

The percussive or impact plate 0 is lowered on to the surface d of the metal bath b situated in the receptacle a. The plate 0 is elastically suspended in a special manner. In order to produce the vibrations, impacts are imparted in rapid succession to the impact plate 0 by an impact device e driven in any desired manner (for example by mechanical, pneumatic, hydraulic. electric or other means) and act directly on the bath b without exerting any harmful action on the receptacle a and the lining 1 thereof.

Preferably, the bath surface (1 is covered with suitable granular, pulverous or fluid substances (for example quicklime, soda, wood charcoal, coke ash, slag or the like, or mixtures thereof) before the impact plate c is placed in position. This covering serves if necessary to bind the substances separated or to render them harmless and in addition to protect the impact plate from the molten metal. It also has the effect of preventing the bath from cooling.

The actual impact arrangement e consists, as shown in the drawing, of a cylinder h alternately charged with pressure medium above and below the piston g and acting by means of the piston rod 2' on the impact element It. The said impact element intermittently strikes in its rapid upward and downward movement against a central anvil portion 1 of the plate c, which oscillates up and down about the level of the stationary bath surface.

The plate 0 is suspended on pins m which extend through bores in a flange 11. provided on the cylinder h and which are loaded above and below the flange n by springs o of substantially equal strength. The said pins in are provided with adjustable nuts p acting as external abutments for the springs, while the upper and lower sides of the flange 12 act as internal abutments for the springs. The pins m may be screwed at their lower ends into threaded portions of the plate 0. The spring suspension may be replaced by pneumatic or other elastic buffers.

The cylinder h is fitted, for example, to the loading plate q, which is suspended by means of rods 1', for example from the crane hook s. The plate q is intended, in conjunction with the im pact arrangement e forming part of the suspension arrangement, to prevent the said impact arrangement from being thrown back by the rebound on the impact of the plate 0 on the metal bath or from being additionally oscillated, whereby the operation of the entire arrangement might be impaired.

The vibrating arrangement described and illustrated, and the operation and suspension thereof are only intended to constitute possible embodiments and numerous modifications are possible without departing from the scope of the principle of the invention.

Having thus particularly described and ascertained the nature of my said invention and the manner in which the same is to be performed, what I claim to be covered by Letters Patent is:

1. A vibrating device for the separation of admixtures of molten metal baths comprising a cylinder, a plate adapted to act on the surface of one end to reciprocate in thecylinder and an element at the other end extending from the cylinder to contact the plate, said impact device oscillating in the cylinder so that the element periodically strikes the plate to impart a vibratory action on the bath.

2. A vibratory device according toclaim 1, in-

which the plate is provided with a central anvil portion which is struck by the said element upo the reciprocation thereof.

3. Ayihratory device according to claim 1, in which a plurality oi springs are provided to suspend the plate from the cylinder whereby the recoil occurring on impact will not vary t e load on the suspension oi the plate.

CLEMENS HANNEN.

REFERENCES CITED The following references are of record in the flle oi this patent:

UNITED STATES PATENTS Number Name Date 2,301,947 Hannen Nov. 17, 1942 

